Filter



April 15, 1952 P, H. WAGNER FILTER 5 Sheets-Sheet 2 Filed July l2, 1948April 15, 1952 P. H. WAGNER 2,593,228

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` f H2,593,228"i I' OFFICE i Paulll. `itfagner, Milwaukee, l 2 I 1Applieation July 12, 1948,-, senaiNwsszs Y l My invention relatesVtofanimprovementdn lters, and has for one purpose to provide anoil lterof maximum eiiiciencyf r lAnother purpose is itoprovideanf improvedfilter in which unintended bypassing of the filter members is prevented.I. .u .i

Another vpurpose is-.to provide an improved Another purpose is toprovide improved means i for `maintaining the lter cartridge underpressuref;V v

Another purpose is to provide an. improved ya claims. (o1. zio- 134)lter particularly,adaptable for use in situations where'extremelyefficient filtering, of lubricating oil is r-necessary. I A k Otherpurposes will appear from time to time in the course of thespecification and claims.

The. fpresent. application constitutes a continuation-in-part ofmyapplication Serial No.

656,345, filed in the United States Patent OfIce on March 22, 1946, andentitled Oil Filter.

I illustrate my invention more orless diagrammatically in theaccompanying. drawings wherein:

` Figure 1. is a vertical axial section;

Figure 2 is'a section on the line. 2--2 of Figure'ly'.; Y'

Figure 3 is a section on the line urel; j

:Figure 4 is a plan view of an intermediate sealing ring;

Figure 5 is aplan.vew of. an end or bottom ring against which zthe ltercartridgemay be pressed; and ,j

Figure 6 is a more or less diagrammatic illustration of the employmentof a plurality of j my s 'a Yof Fig- Viilters in connectionA with` asingleinstallation.

Like parts are indicated by vlike symbols throughout the specificationand drawings.` ,a

Referring to the drawings, ,I generally indicates a housing shown as acylinder orshell of metal. It will be understood that various forms maybe l employed, but a cylindrical shell is advantageous forstrength andfor economy of space.- 2indicates a lower head or bottom wall. "ItVmaybe welded, or otherwise securedpto the shell I. It may, if desired,be supported-onaany suitable supporting structure or legs,indicated indotted .line in Figure l1, and generally indicated as 3.

An oil inletpipe 4 has aterminal portion- 5 extending upwardly-throug'hlthe bottom wallgj2 into what may be describedas a sump space,;atthe bottom of .the lterml` is anygsuitable `control ,or closure:valve: for the. oil inletbpipe,

@Material froniwithin the sump area may be recessed packing 2'I.

Vin preventing anylsubstantial divergence of the liquid inthesump. Theytend to` immobilize or prevent currents' in the liquid, but .do Athiswithout cutting off` communication between adjacent-compartments. Theyare ported, ...as at I2, and denne bottom passages belovlltheV edges I3.The baledspace is in communication with the exterior space throughapertures I4.

y The sleeve 9 and the wall I0 are shown ias of substantially the sameheight, and areadapted toreceivethe bottom pressure plate I5 with itscircumferential, upwardly extending flange I6 aligned, generally, forconvenience, with. thefwall Ill. -The plate lI5 is provided with aplurality of oil discharge apertures I'I. The plate. I5 .iscentrallyapertured, as at I8, to permit-thezpassage Atherethrough of l the.tension member ior,V rod I9.

The lower end of the rod passes. downwardly through an aperture 20 inthe bottom .plate Zand throughthe central bore of a i'lxed member 2l,externally screw-threaded at its loweit end, as at -22,to receive theouter closure sleeve.23 Vwith its l The lower end of the rod I9 isscrew-threaded, as at v25,"to receive the locking nut 26,with its Thenut is providedwith indentations orsapertures 28, adaptedto receive asuitabletooLwhen itis desired lto impart relative rotation tothenut 25AandtheV rod- I9. The rod* t9 isshown as squared'at eachcend; aslat*29and t3l). l `The upper end of the rod isthreaded,

as at ?I.V 'A coilt spring 32, Ysurrounding;the4 rod, is located within"the; sleeve 9 and is; interposed betweenthe bottomplate 2 and the bottomn lter pressure plate, I5. fAny suitable cartridges; 33 may beemployed.; each i cartridge having; ajcentral aperture 3,4 Vthrough`which the rod I9 passes. The cartridges may be. advantageously madetongue-shaped? and I illustrate `two superposed cartridges or.,cartridgelayers.v The cartridges may be made' of any suitable interiorpaclingsurrounded ,by apervious-outer covering of fabric or other suitablematerial. The' two c aptridges or cartridge layers are shown asseparated by an intermediate cylinder ring, shown as formed of an upperring 35 an'd a lower ring 36, the two rings being secured together bysuitable securing members 31, with a flexible sealing ring 38 compressedtherebetween, and having a circumferential loose lip or flap 39.

The filter cartridges receive an upper pressure plate 40 withitsoil-fadmitting apertures 4I. It is centrally apertured, as at'42, to'permit the passage of the rod L9. It is provided with a top centralpressure plate or washer 43, adapted to receive the nut 44 which isthreaded upon the upper thread 3l. Confining circumferential ridges ortubes 45, 46 are positioned, respectively,

bers or rods 14 by rotatable connections 14a, whereby, when anindividual filter has been rotated out of alignment, by rotation ofthefsleeve or hub 13, the filter may be rotated about the axis of themembers 14 and 14a.

It will be realized that, whereas, 1 have described and illustrated apractical and operative device, nevertheless many changes may be made onthe lower side of the upper pressure plate 43 and on the upper side4 ofthe pressure ring member 35. 50 is any suitable oil supply pipe which isshown as extendingdirectly to the removable cover I which is secured byits outer flange 52 to the corresponding outer flange 53 of the shell Yl'. The two flanges may be Secured, together.

againstany suitablep'acking 54, for example, by the bolts 55 and nuts56: I illustrate, as secured A to the-cover or closure 5 I, an eye 51,whereby the filter unit, as a whole,-` maybe supported or rest, 58 isany suitablethermometer.

A gauge pipe 60 extends between thesurnp space below the plate I5 andthe oilentryfspace above the plate 40,. BI indicates l.any suitablegauge. A bypass passage 62 VAextends between the two same spaces, and isprovided4 with any -suitable control valve 63. I may find itadvantageous to apply heat to the filter; vI illustrate, for example, aVcircumferentially extending resistance heater 65, which may be held inposition, for example, by a surrounding compression ring 66 havingoutwardly extending flanges 61 connected by a bolt S8, with its-nut 39.1 9 indicates any suitable actuating circuit. It will be understood,however, that any other suitable heating means may be employed.

Whereas I illustrate a singleA unit, it will be understood that I mayemploy a plurality of units which are preferably connected in parallel.

support extendingupwardly fromany suitable basel1| and havingsecuredthereon a'plurality of abutments 12,located at various levels.Positioned above each abtitment is a rotatable hub 13 fromr whichextends any suitable support l14 to the individualA filter' assemblies,which I indicate as A, B and C. A main oil supply is indicated as at 80,extending to amani-fold 8I'from Vwhich extend branches 82 to eachfilter. 83 is a'discharge manifold connected to the individual filtersby receiving ducts, whereby the cleaned oil may be delivered to aunitary oil return duct 85. It will be understood that any suitablevalving 86 may be employed whereby one or more of the filters may beremoved from service for cleaning or inspection, or'for replacement ofcartridges,I while at least one ofthe filters is left in operation. A

surge load on a single filter is: effective to supply at least a minimumsupplylof oil.

It may also be advantageous to provide'more filter units than neednormally be used at the same time, so that a stand-in unitwill always beavailable, in cases wherel any interruption of the supply of filteredoil is dangerous.

The support shown in Figure 6 permits individual lters to be swung outrof their normal vertical alignment in which position they'may readilybe removed or opened. I;may,'for;ex amplefconnect'the individualfiltersto the'memtrust or' locked against the inner surface of the shellI, with the result that a bypassing of, oil

I illustrate, for example', in Figure 6, a yvertical ,345

in the size, shape, number and disposition of parts without departingfrom the spirit of invention. I therefore wish my description anddrawings, to be taken as in a broad sense illustrative or diagrammatic,rather than as limiting me to my precise showing.

The use and operation of the invention are as follows:

I-illustrate a type of filter and filter support which permits thesimultaneous employment of a plurality of filters in a single circuit,and also permits individual filters to be cut out of circuit andreplaced by stand-by units. It l will be understood, however,that .thefilter herein .de--V scribed may be used as a single unit, andimay, forexample, be mounted on any suitable, support, as indicatedl in dottedline yat 3 in Figure l. Since the material is subjectedv to 'highpressure, Iitis important that there be no leakagev permitted. The nut2B is reset toreceiveth'e nut gasket 21, which may be of fneoprene or aoutward. thrust against the inner faceof the.

shell I in response tothe compression to1 which the cartridges aresubjected. At the' same time, thefi'exible sealing lip 39 is firmlyloutwardly is substantially impossible. The oil is admitted through theinlet 4 to the sump spacej The sump space will normally be filledwith-dirty oil. The oil is suitably heated by the resistance heater 65,and flows, under pressure, upwardly through the inlet I1, then throughthe cartrides 33, and, finally, outwardly through :the apertures4l formovement along the cleaned oil discharge pipe 50. The sludge orimpurities may be removed along the discharge pipe v1.

The radial members I1 arev suitably shortened to terminate along theedges I3, thus maintaining a general communication between theindividual portions or segments of the sump space.

Oil cannot bypass upwardlyi about the cartridges because of the outwardpinching or thrust of the ,cartridges caused by the members'45, 46 andI6.' A t thesame time, the'sealing'li'p39 loperates to the sameieii'ect.

1. A filter structure for liquids including a housing having acircumferential'side wall, va bottom wall 'and -a removable "'top wall,-a central rod extending axially through the housing and having 4endportion :extending downwardly "through the bottom wall, its upper endlying' normally'below the removable top wall, a" pluralityof'separableflex'ible and liquid 'pervious walled cartridges superposedabout `said-rod,`each cartridge having 'a1 wall portion lvdefiningracentral passage through which saidrfrod passes .each cartridge. having'.an interioribody` ofpltering material :Within andisurrounded by thepervious wall, a lower pressure disk surrounding a lower portion of therod, means for spacing it upwardly above the bottom of the housing, thecartridges being superposed upon each other and resting as a group uponsaid lower pressure disk, an upper pressure disk positioned upon theupper end of said group of cartridges and being apertured, said rodextending upwardly through said aperture, the lower pressure disk havingadjacent, but within its outer edge, a circumferential projection, theupper pressure disk having a downwardly extending circumferentialprojection adjacent, but within its outer edge, and an additionalabutment between adjacent filter eartridges, such abutment including Aacircumferential projection adjacent, but within the outer edges, of theadjacent filter cartridges, and means for urging the upper and lowerpressure disks together along the rod and for thereby subjecting theentire group of cartridges to sufiicient pressure to force a.concentrated sealing mass of the contents of the cartridges between thesaid circumferential projections and the opposed inner surface of thecircumferential side wall, the pressure disks beingapertured means thelower pressure disk to the space above the upper pressure disk, andcontrollable means for f normally closing said passage.

PAUL H. WAGNER.

REFERENCES CITED The following references are of record in the v le ofthis partent:

and including a by-pass duct extending, ex-` teriorly of the cartridges,from the space below UNITED STATES PATENTS Number Name Date 188,274Woolsey Mar. 13, 1877 620,621 Veazie Mar. 7, 1899 967,544 Rarick Aug.16, 1910 989,965 Harloe Apr. 18, 1911 1,077,619 Maranville Nov. 4, 19131,367,325 Probst Feb. 1, 1921 1,769,388 Prentice July 1, 1930 1,838,263Kelley Dec. 29, 1931 1,917,121 Hughson July 4, 1933 2,007,615 Ross July9, 1935 2,049,498 Hardinge Aug. 4, 1936 2,065,658 Compton Dec. 29, 19362,093,549 Compton Sept. 21, 1937 2,287,526 Krogman June 23, 19422,300,014 Saussure Oct. 27, 1942 2,353,433 Auberscheck July 11, 19442,381,627 Thompson Aug. 7, 1945 2,388,821 Braun Nov. 13, 1945 i FOREIGNPATENTS Number Country Date 117,357 Germany Sept. 27, 1898 641,246Germany Jan. 7, 1937

